chelsea clinton, the daughter of the former president bill clinton and former secretary of state hillary rodham clinton announces she's pregnant. she and her husband, marc mezvinsky, are expecting their first baby this fall. chelsea, sharing the news at a clinton foundation event on empowering women. >> i just hope that i will be as good a mom to my child, and hopefully children, as my mom was to me. >> for "teen kids news," i'm rick leventhal, "fox news channel in the classroom." >> the famous astronomer galileo said that we can't understand the world around us without first understanding math. what galileo didn't say was that seeing math in action can be surprisingly fun. scott tells us more. >> the national museum of mathematics welcomes visitors of all ages seven days a week. >> they make, like, games, and you're learning and you don't even notice. >> so, people think that math is just about, you know, numbers and symbols all on a page and incomprehensible equations. and we wanted to show people the meaning behind the math. >> located on manhattan's east side, the museum is chock-ful